Make tidy search for files recursively again
Make tidy search for files recursively again

In #7348 `os.walk` was replaced with `os.listdir`. The latter is not
recursive, which results in only the root directory files getting linted

The changes to `ignored_files` are needed because calling `os.walk(".")`
results in `./` getting prefixed before each path

meh/servo,j3parker/servo,avadacatavra/servo,jimberlage/servo,mbrubeck/servo,cbrewster/servo,avadacatavra/servo,DominoTree/servo,anthgur/servo,mattnenterprise/servo,SimonSapin/servo,nrc/servo,KiChjang/servo,aidanhs/servo,caldwell/servo,mattnenterprise/servo,SimonSapin/servo,RenaudParis/servo,cbrewster/servo,dsandeephegde/servo,sadmansk/servo,anthgur/servo,WriterOfAlicrow/servo,ConnorGBrewster/servo,paulrouget/servo,DominoTree/servo,mbrubeck/servo,runarberg/servo,youprofit/servo,pyfisch/servo,peterjoel/servo,peterjoel/servo,jdramani/servo,bjwbell/servo,WriterOfAlicrow/servo,AnthonyBroadCrawford/servo,dagnir/servo,peterjoel/servo,KiChjang/servo,j3parker/servo,nnethercote/servo,meh/servo,jimberlage/servo,thiagopnts/servo,caldwell/servo,eddyb/servo,j3parker/servo,nrc/servo,brendandahl/servo,KiChjang/servo,jimberlage/servo,anthgur/servo,steveklabnik/servo,dati91/servo,dsandeephegde/servo,larsbergstrom/servo,jlegendary/servo,jimberlage/servo,paulrouget/servo,jdramani/servo,dsandeephegde/servo,sadmansk/servo,CJ8664/servo,GyrosOfWar/servo,saneyuki/servo,emilio/servo,AnthonyBroadCrawford/servo,szeged/servo,larsbergstrom/servo,DominoTree/servo,KiChjang/servo,ConnorGBrewster/servo,DominoTree/servo,caldwell/servo,peterjoel/servo,mbrubeck/servo,huonw/servo,steveklabnik/servo,RenaudParis/servo,splav/servo,WriterOfAlicrow/servo,DominoTree/servo,avadacatavra/servo,GyrosOfWar/servo,larsbergstrom/servo,SimonSapin/servo,walac/servo,bjwbell/servo,aidanhs/servo,emilio/servo,jlegendary/servo,mbrubeck/servo,notriddle/servo,runarberg/servo,mbrubeck/servo,rnestler/servo,rnestler/servo,splav/servo,cbrewster/servo,canaltinova/servo,runarberg/servo,paulrouget/servo,CJ8664/servo,WriterOfAlicrow/servo,nnethercote/servo,szeged/servo,youprofit/servo,rentongzhang/servo,fiji-flo/servo,DominoTree/servo,eddyb/servo,youprofit/servo,nnethercote/servo,notriddle/servo,j3parker/servo,cbrewster/servo,rnestler/servo,meh/servo,splav/servo,huonw/servo,saratang/servo,jimberlage/servo,upsuper/servo,GyrosOfWar/servo,sadmansk/servo,sadmansk/servo,huonw/servo,pyfisch/servo,CJ8664/servo,ConnorGBrewster/servo,j3parker/servo,DominoTree/servo,caldwell/servo,SimonSapin/servo,canaltinova/servo,fiji-flo/servo,paulrouget/servo,splav/servo,RenaudParis/servo,mbrubeck/servo,splav/servo,nnethercote/servo,caldwell/servo,steveklabnik/servo,canaltinova/servo,steveklabnik/servo,rentongzhang/servo,aidanhs/servo,peterjoel/servo,splav/servo,bjwbell/servo,upsuper/servo,CJ8664/servo,huonw/servo,larsbergstrom/servo,paulrouget/servo,mattnenterprise/servo,jlegendary/servo,huonw/servo,fiji-flo/servo,saneyuki/servo,emilio/servo,mattnenterprise/servo,jdramani/servo,walac/servo,caldwell/servo,cbrewster/servo,huonw/servo,eddyb/servo,GyrosOfWar/servo,upsuper/servo,splav/servo,larsbergstrom/servo,canaltinova/servo,jdramani/servo,dhananjay92/servo,pyfisch/servo,anthgur/servo,paulrouget/servo,dhananjay92/servo,GyrosOfWar/servo,emilio/servo,rentongzhang/servo,dagnir/servo,SimonSapin/servo,dsandeephegde/servo,meh/servo,szeged/servo,szeged/servo,meh/servo,rnestler/servo,rentongzhang/servo,RenaudParis/servo,brendandahl/servo,saneyuki/servo,rnestler/servo,saratang/servo,walac/servo,larsbergstrom/servo,anthgur/servo,rentongzhang/servo,AnthonyBroadCrawford/servo,nrc/servo,AnthonyBroadCrawford/servo,canaltinova/servo,paulrouget/servo,notriddle/servo,mattnenterprise/servo,szeged/servo,upsuper/servo,WriterOfAlicrow/servo,pyfisch/servo,saratang/servo,aidanhs/servo,splav/servo,runarberg/servo,walac/servo,GyrosOfWar/servo,aidanhs/servo,thiagopnts/servo,KiChjang/servo,eddyb/servo,peterjoel/servo,dsandeephegde/servo,upsuper/servo,saratang/servo,jdramani/servo,youprofit/servo,peterjoel/servo,KiChjang/servo,jlegendary/servo,ConnorGBrewster/servo,nnethercote/servo,notriddle/servo,peterjoel/servo,rentongzhang/servo,pyfisch/servo,rnestler/servo,nnethercote/servo,dsandeephegde/servo,saneyuki/servo,thiagopnts/servo,eddyb/servo,larsbergstrom/servo,meh/servo,dhananjay92/servo,dagnir/servo,pyfisch/servo,CJ8664/servo,larsbergstrom/servo,steveklabnik/servo,szeged/servo,notriddle/servo,canaltinova/servo,saneyuki/servo,pyfisch/servo,meh/servo,saneyuki/servo,thiagopnts/servo,avadacatavra/servo,avadacatavra/servo,dagnir/servo,steveklabnik/servo,ConnorGBrewster/servo,upsuper/servo,anthgur/servo,paulrouget/servo,youprofit/servo,bjwbell/servo,KiChjang/servo,mattnenterprise/servo,dagnir/servo,dati91/servo,notriddle/servo,WriterOfAlicrow/servo,brendandahl/servo,dati91/servo,eddyb/servo,paulrouget/servo,jimberlage/servo,saneyuki/servo,szeged/servo,SimonSapin/servo,avadacatavra/servo,saneyuki/servo,dati91/servo,j3parker/servo,dhananjay92/servo,nnethercote/servo,mbrubeck/servo,anthgur/servo,nrc/servo,CJ8664/servo,canaltinova/servo,saratang/servo,thiagopnts/servo,peterjoel/servo,fiji-flo/servo,fiji-flo/servo,walac/servo,peterjoel/servo,thiagopnts/servo,fiji-flo/servo,emilio/servo,fiji-flo/servo,avadacatavra/servo,DominoTree/servo,splav/servo,nnethercote/servo,RenaudParis/servo,cbrewster/servo,nnethercote/servo,AnthonyBroadCrawford/servo,RenaudParis/servo,ConnorGBrewster/servo,emilio/servo,dhananjay92/servo,DominoTree/servo,cbrewster/servo,jlegendary/servo,anthgur/servo,emilio/servo,cbrewster/servo,runarberg/servo,rnestler/servo,mbrubeck/servo,j3parker/servo,szeged/servo,jimberlage/servo,fiji-flo/servo,upsuper/servo,WriterOfAlicrow/servo,sadmansk/servo,canaltinova/servo,SimonSapin/servo,youprofit/servo,KiChjang/servo,youprofit/servo,jdramani/servo,notriddle/servo,saratang/servo,notriddle/servo,CJ8664/servo,RenaudParis/servo,brendandahl/servo,notriddle/servo,saneyuki/servo,dsandeephegde/servo,caldwell/servo,sadmansk/servo,saneyuki/servo,emilio/servo,emilio/servo,brendandahl/servo,runarberg/servo,dati91/servo,GyrosOfWar/servo,dhananjay92/servo,aidanhs/servo,rentongzhang/servo,thiagopnts/servo,CJ8664/servo,dhananjay92/servo,jdramani/servo,AnthonyBroadCrawford/servo,dati91/servo,dati91/servo,notriddle/servo,bjwbell/servo,AnthonyBroadCrawford/servo,walac/servo,steveklabnik/servo,brendandahl/servo,brendandahl/servo,runarberg/servo,paulrouget/servo,szeged/servo,upsuper/servo,avadacatavra/servo,nrc/servo,dagnir/servo,KiChjang/servo,splav/servo,jlegendary/servo,pyfisch/servo,jimberlage/servo,rnestler/servo,larsbergstrom/servo,aidanhs/servo,larsbergstrom/servo,jimberlage/servo,walac/servo,eddyb/servo,thiagopnts/servo,pyfisch/servo,sadmansk/servo,eddyb/servo,nrc/servo,DominoTree/servo,SimonSapin/servo,mattnenterprise/servo,pyfisch/servo,ConnorGBrewster/servo,nrc/servo,dati91/servo,bjwbell/servo,nnethercote/servo,sadmansk/servo,szeged/servo,huonw/servo,dsandeephegde/servo,ConnorGBrewster/servo,mattnenterprise/servo,emilio/servo,bjwbell/servo,saratang/servo,jlegendary/servo,dagnir/servo,KiChjang/servo